For example Ice-10 will be active only when the planet type is a cold environment such as boreal and arctic. Garden of Eden will be active when the planet type is a more appropriate lush enviroment such as terran and forest. 


A planet may have a base anomly that will be active no matter what and a conditional anomaly active only under a certain or more specific planet type. Maybe even two conditional anomlies that will make the player choose what they want more, if the planet type does not meet both conditions. 


Basically this could provide a better reason to terraform a planet to a specific type rather than terraforming all planets to forest or atoll, which is what i do anyway. I think this is just a cool little thing that may be implemented.